JIS G4904 Seamless Nickel-Chromium-Iron Alloy Heat Exchanger Tubes

JIS G4904 Seamless Nickel-Chromium-Iron Alloy Heat Exchanger Tubes

JIS G4904 Seamless Nickel-Chromium-Iron Alloy Heat Exchanger Tubes

1. Scope
This Japanese Industrial Standard specifies the seamless nickel-chromium-iron alloy tubes, intended for heat exchanger tubes and condenser tubes for chemical and petroleum industries, steam generator tubes for nuclear industry, and the like, all of them designed for exchanging heat between the inside and outside of tubes.

2. Grade and symbol
Pipes shall be classified into 6 grades and their symbols shall be as below.
JIS G4904 Grade NCF600TB
JIS G4904 Grade NCF625TB
JIS G4904 Grade NCF690TB
JIS G4904 Grade NCF800TB
JIS G4904 Grade NCF800HTB
JIS G4904 Grade NCF825TB

3. JIS Number and Corresponding ASTM Standard
JIS G4904 NCF600TB = ASTM B167 NO6600
JIS G4904 NCF800TB = ASTM B407 NO8800
JIS G4904 NCF825TB = ASTM B423 NO8825

4. The Chemical Composition and Mechanical Properties in details, please check JIS G4904.
5. The tolerance on dimension in details, please check JIS G4904.

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